Neural basis of responses to sex pheromones, Biology

Neural Basis of Responses to Sex Pheromones

The ability of insects to detect and discriminate between a variety of pheromones with great sensitivity depends on the presence of specific neural structures in the neuropile of the male antennal lobes. The female antennal lobe lacks these structures. The electrophysiological signals resulting from interaction between pheromonal molecules and antennal olfactory receptors are passed via the olfactory nerve to the specific part of the brain containing specific neural circuitary to decode complex pheromonal signals.

The brain then translates pheromonal information into the act of directional locomotion or orientational responses. There are pheromones that act more slowly and have longer lasting effects. For example, if a newly fertilised female mouse is caged with a strange male, the odor of that male will terminate pregnancy. The pheromone responsible comes from the urine of the male. It is received by the olfactory receptors of the female and triggers activity in the hypothalamus which directs the pituitary to release a hormone that reduces the steroid hormone output of the ovaries. The uterus does not receive adequate hormones for implantation of foetus and the pregnancy aborts.

Posted Date: 1/17/2013 1:33:16 AM | Location : United States

Related Discussions:- Neural basis of responses to sex pheromones, Assignment Help, Ask Question on Neural basis of responses to sex pheromones, Get Answer, Expert's Help, Neural basis of responses to sex pheromones Discussions

Write discussion on Neural basis of responses to sex pheromones
Your posts are moderated
Related Questions
How different is the growth according to the biotic potential of a viral population from the growth according to the biotic potential of a bacterial population? The growth cur

Types of Development of Animals Different animals have evolved various methods of development. These methods can be broadly categorized into two categories (i) Direct devel

Factors Controlling Stomatal Aperture 'Khul Ja Sim Sim' the two rocks slide and the gates to a great treasure open. With these magic words "Ali Baba and Chalis Chor" could ope

Q.What is ST Heart Rate Slope? Correcting ST depression for heart rate, seems to be based on second physiological principles and has been proposed by a number of investigations

"Height" is an example of a gene, but "Short" is an example of...

Rejection Reaction For rejection reaction the physiological and biochemical processes are set in the pistil by the recognition reaction specific to the type of pollen that lan

Q. How different are gymnosperms from pteridophytes and bryophytes? Gymnosperms are not cryptogamic as pteridophytes and bryophytes are. They are phanerogamic and so they form

what is the normality law?

The fibrous rings of the four valves of the heart are continuous with each other. They not only form the basis for the attachment of the corresponding valve cusps but also form an